Variable-speed gearing.



G. J. L. MOORE.

VARIABLE SPEED GEARING.

APPLICATION FILED 001.11, 1912.

1,124,783. Patented Jan. 12, 1915.

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A t t orn eys' 0. J. L. MOORE.

VARIABLE SPEED GBARING. APPLICATION rIL'ED OCT. 11, 1912.

Patented Jan.12, 1915.

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amt %""J'" i m W -W m Attorngs WLtnesses pair snares name at a CHARLESJOSSELYN LAY MOORE, OF MERROW, NEAR GUILDFORID, ENGLAND.

VARIABLE-SPEED 'GEARING.

Specification of Letters Patent. Patented Jan. 12, 1915.

Application filed October 11, 1912. Serial in). 725,149.

in the county of Surrey, in England, have invented certain new anduseful Improve- .ments in Variable-Speed Gearing, of which the followingis a specification.

This invention relates to variable speed gearingparticularly applicablefor use with motor road vehicles and the like and ofthat type whichinclude an eccentric and strap or epicyclic or sun and planet gearingsystems between the driving and'driven mem bers, and means forcontrolling said strap or gearing, the construction being such thatthese elements may be restrained against axial rotation for direct drivebetween said driving and driven members or given a limited axialrotation for reducing speed between the members, or again given a higheraxial rotation to render one member free of the other and finally givena still higher rotation to produce revolution inreversedirectionsbetween said members.

The invention consists in mounting the eccentric on the driven memberand in forming the driving member with a revoluble casing provided withinterior teeth gearlng with exterior teeth on the eccentric strap, andin providing the latter with internal teethwhich gear with a member inalinement with the driven member and controlled by epicyclic gearing.

The invention also comprises means for moving the strap faster on theeccentric than the casing will permit, to reverse the eccentric, andfurther to certain details of construction of controlling worm gear andbrake drums. 1

The invent-ion further consists in the combination of a sun-wheelrigidly mounted on the driven member, a system of planet wheels carriedby a casing rigidly mounted on the driving member and certain of whichgear with the sun-wheel, said planet wheels in turn gearing with othersun-wheels loosely mounted on said driving member or with spur wheelsmounted exterior thereto and worm and worm wheel gearing co-acting withsaid other sun-wheels or with the spur wheels to effect the control ofthe axial rotation of said planet wheels.

The invention still further consists in the general combination andarrangement of parts constituting three embodiments of .wheels 22, 23keyed thereto.

such variable speed gearing all as hereinafter fully described withreference to the accompanying drawings in which:

Figurel is. a longitudinal central section of one embodiment of theimproved speed gearing. Fig. 2 is'a' plan view of Fig. 1, Fig. 3 is asection on the line A 21 of Fig. 1 looking toward the left. Fig. is asection on the line 13-13 of Fig. 1- looking toward the right. Fig. 5 isa longitudinal vertical section of another embodiment of the improvedgearing. Fig. 6 is an elevation of the left hand side of Fig. 5 with thecasing cover removed, and Figs. 7 and8 are similar views to Figs. 5third form of gearing.

Referring to Figs. 1 to 4 the driving shaft is designated by thecharacter 2 and the driven shaftby 3. Fixed to or integral with thedriven'shaft 3 is an eccentric 4: and these parts are inclosed in adriving casing 5 fixed to the shaft 2 and having internal teeth 6gearing with external teeth 7 on the strap 8 of the eccentric 4, saidstrap being held in place by a plate 9 screwed to the eccentric.

vThe strap 8 is also provided with internal On the shafts 15 outside thecasing are mounted bevel Wheels 16 gearing with a bevel wheel 17integral witha brake drum 18 loosely mounted on a boss extending fromthe casing 5. drum also loosely mounted on said boss, and 20 a disklocated between the brake drums and fixed to the boss, shafts 21 passingthrough said disk and carrying planet The wheels 22, 23 are of differentdiameters and mesh with sun-wheels 24 and 25 respectively on the brakedrums 18 and 19.

26 designates a collar mounted on the boss outside the drums. and 27 acover for the open end of easing 5.

The operation of this gearing is as follows: When the brake drums 18 and19 are both free the eccentric strap 8 will revolve with the casing 5through theteeth 6 and 7 and since it cannot revolve on its axis owingto the sleeve 12 being held by the worms 14, the eccentric 4 is causedto revolve with the and 6 respectively of a 19 designates a second brakestrap, thus imparting direct transmission to .the driven shaft3 and theavhole mechanism revolves with driving shaft 2. If the drum 19 be heldso that it revolves more slowly than the shaft 2, the planet wheels 22,23 will be revolved upon their axes causing the speed of the drum 18 tobe retarded. This retardation is transmitted through beveled wheels 1716 to the worms 14 causing same to revolve and rotate the worm-wheel 13and through same the sleeve 12 and teeth 11, which latter acting on theteeth'lO of strap 8 causes the latter to revolve on the eccentric 4 sothat the latter will not revolve as quickly as previously, thusimparting a reduced speed to the driven shaft 3. By increasing the holdon or reducing the speed of drum 19 the speed of the shaft 3 is reduceduntil the strap 8 revolves on the eccentric 4 without imparting-anymotion thereto, thus giving free engine or similar effect. Theproportions of the gearing are preferably so arranged that this resultis obtained when the drum 19 is held from turning. If the drum 18 beheld the worms 14 will rotate more quickly and the teeth 11 will attemptto turn the strap 8 faster on the eccentric 4 than the motion of thecasing 5 will allow, thus causing the eccentric 4 to revolve in thereverse direction. It will be apparent that by placing one or more brakedrums adjacent to the drum 19, each provided with sun and planet wheelsas between the drums 19 and 18, a variation in speed can be obtained aseffectively as by relying on variation of load or pull by the brakestrap on said drums 19 or 18.

Referring to Figs. 5 and 6 the character 2 also designates the drivingshaft and 3 the driven shaft on which is keyed a sunwheel 28. 29designates a driving. casing secured to the driving shaft 2 by means ofthe casing cover 30 fixedly mounted on saidshaft, said casing beingclosed at its other end by a cover 31. Gearing with the sunwheel 28 arefour planet-wheels 32 integral with each of which is a planet-wheel 33meshing with a sun-wheel 34 loosely mounted or free to revolve on thedriving shaft 2. Integral with said sun-wheel 34 is a further sun-wheel35 with which gear planet-wheels 36vand each having in one piecetherewith a planet-wheel 37 meshing with a sun-wheel 38 integral with asleeve 39 loosely mounted on the driving shaft 2. The sleeve 39 carriesa worm wheel 40 with which engage worms 41 on shafts 42 having bearingin the aforesaid cover 30 and on said shafts are mounted bevel wheels 43which gear with bevel wheels integral with brake drums as de'- scribedabove. The pairs of planet-wheels 32, 33 and 36,37 are mounted onspindles 44 havingbearing in the casing 29 and cover 31 and said pairsof wheels are separated by distance collars 45.

In the construction of Figs. 5 and 6 all the gearing between thesun-wheels 28 and 38 is of the sun and planet or epicyclic type as shownand described above but in the construction shown in Figs. 7 and 8 thisgearing comprises a combination of epicyclic and ordinary spur gearingand comprises two planetwheels 46 on shafts 47 and gearing with thesun-wheel 28, each of saidplanetwheels having integral therewith apinion 48 meshing with a spur-wheel 49 on a counter-shaft 50 and againintegral with each of said spur-wheels 49 is a planet-wheel 51 whichgears with the sun-wheel 38, the rest of the construction being similarto that described with reference to Figs. 5 and 6.

In F igs- 6 and 8, 52 designates holes for passage of bolts for securingthe casing cover 31 in place. The operation of the gearings described isas follows :If the worms 41 are not axially revolved or are preventedfrom revolving as described above the sleeve 39 is locked and preventedfrom revolving on the driving shaft 2 and in its turn prevents the wheel38, 37, 3 6, 35, 34, 33 and 32 (Figs. 5 and 6) from revolving on theiraxes. The planet-wheels 32 thus cause the sun-wheel 28 on the drivenshaft 3 to revolve at the same speed as the driving shaft 2 thusimparting a direct drive to said driven shaft 3, the whole of themechanism revolving with the shaft 2. If the worms 41 are caused torevolve slowly the sleeve 39 and wheels 38, 37, 36, 35, 34, 33 and 32will revolve on their respective axes, the gearing being so arranged andproportioned that the planet-wheels 32 are revolved on the spindles 44in the same direction as the driving shaft 2 is revolved, thus the saidwheels 32 will not revolve the sun-wheel 28 so rapidly as previously anda reduced speed is imparted to the driven shaft 3.

By increasing the speed of the worms 41 the speed of the planet-wheels32 is increased until they travel around the sunwheel 28 withoutimparting any motion thereto thus giving free engine or similar effect,,and again if the speed of the worms is still further increased theplanet-wheels 32 will cause the sun-wheel 28 to revolve in the oppositedirection and reverse motion will be given to shaft 3. The samedescription as above applies also to the construction of Figs. 7 and 8except that the wheels 51 49, 48 and 46 must be substituted for wheels37, 36, 35, 34, 33 and 32 with wheels 46 corresponding to wheels 32.

What I claim as my invention and desire to secure by Letters Patent lofthe United States is 1. In a variable speed gearing the combination withdriving and driven members of an element on the driven member, a casingrevoluble with the "driving member, axially rotatable mechanism carriedby said casing engaging the element on the driven member, and wormgearing in operative relation with said mechanism, whereby the lattermay be restrained from axial rotation for direct drive between thedriving driven members, or given a limited axial rotation for'reducingthe relative speed of said members, or again given a higher axialrotation to render one member free of the other, and finally'given astill higher rotationto produce revolution in reverse directions betweensaid members.

2. In a variable speed gearing the combination with driving and drivenmembers of an element on the driven member, a casing revoluble with thedriving member, .axially rotatable mechanism carried by said casingengaging the element on the driven member, worm gearing in operativerelation with said mechanism, and a.plurality of brake drums adapted tocontrol said worm gearing whereby said mechanism may be restrained fromaxial rotation for direct drive between the driving and driven members,or given a limited axial rotation for reducing the relative speed ofsaid members, or again given a higher axial rotation to render onemember free of the other, and

finally given a still higher rotation to pro-' duce revolution inreverse directions between said members. i

3., In a variable speed gearlng the combination with driving and drivenmembers of an element on the driven member, a casing revoluble with thedriving member, axially rotatable mechanism carried by said casingengaging the element on the driven member, worm gearing in operativerelation with said mechanism, a plurality of brake drums, one of whichis geared to the worm gearing,

and planet gearing between adjacent drums whereby said mechanism may berestrained from axial rotation for direct drive between the driving anddriven members, or given a limited axial rotation for reducing therelative speed of saidmembers, or again given a higher axial rotationto'render one member free of the other and finally given a still higherrotation to produce revolutionin reverse directions between saidmembers.

and

4. In a variable speed gearing the combination of a driving member, adriven member, a sun wheel mounted rigidly on the driven member, acasing revoluble with the driving member, a system of planet wheelscarried by said casing, certain of which mesh with said sun-wheel, asystem of gears independent of said.- driving member meshing with theremainder of said planetwheels, and worm gearing in operative relationwith said system of gears, whereby said planet-Wheels are restrainedfrom axial rotation for direct drive between the driving and drivenmembers, or given a limited axialrotation for reducing the relativespeed driving member, a system of planet-wheels carried by said casingcertain of which mesh with said sun-wheel, a system of gearsindependent-of said driving member. meshing with the remainder of saidplanet-wheels,

worm gearing in operative relation with said system of gears, and aplurality of brake drums adapted to control said worm gearing, wherebysaid planet-wheels are restrained from axial-rotation for direct drivebetween the driving and drivenmembers, or given a limited axial rotationfor reducing the relative speed of said members, or

again given a higheraxial rotation to render one member free of theother, and

finally given a still higher rotation to produce revolution in reversedirections between said members.

In witness .whereof have signed this specification in the presence oftwo witnesses.

CHARLES JOSSELYN LAY MOORE. Witnesses:

S.'FORn,

O. J. WORTH.

